Smproved hinge for wioldersj flasks



lUrrnn STATES GEORGE GRANT, OF TROY, NEV YORK.

HVIPROVED HINGE FOR HOLDERS FLSKS.

Specification forming part of Letters Patent No. QAQ. dated December` 7, 1852.

To all whom it may concern:

Be it known that I, GEORGE GRANT, of Troy, in the county of Rensselaer and State of New York, have invented a certain new and useful Hinge for Molders7 Flasks; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specication, of which- Drawing No.1 is aperspective view of a flask with the hinges attached, and Drawing No. 2 is a perspective view of a fiask with the cope lifted and thrown back, showing` the manner in which the hinges operate, the same letters having reference to like parts in both drawings.

It is well known among experienced molders that it is with great difficulty and almost impossible to lift a cope from the nowel part of a flask when the cope is large and heavy, either by hand or with a crane constructed for that especial purpose, without endangering and breaking down the edges or corners of the mold, thereby destroying or greatly damaging it. This is caused by the difficulty had imparting the whole surface of the cope at the same instant truly and evenly off from the pattern and nowel, especially when the pattern has deep and almost perpendicular moldings, bold ornaments, &e. Therefore any invention or improvement in hinges for melders flasks by means of which the cope can at parting it from the pattern and nowel be guided and lifted evenly and very nearly perpendieularly until it has cleared the pattern, when all danger of injury to the cope of the mold is removed, has been a desideratuin with melders.

The nature of my invention consists in construct-ing the butt or under part of the hinge with upright jaws and a shoulder or rib on one side,inclined downward. The upper part of the hinge is prolonged, and terminates in a cam-shaped toe projecting downward from a horizontal line and at the same angle as the inclined shoulder or rib, and affixed to the side as a guide-pin.

Then the hinge is put together in readiness for operation, the guidepin is between and at the bottoni of the jaws, while the face or under edge of the cam-shaped toe fits snugly and evenly on the inclined rib or shoulder.

In operating the hinge, as in lifting a cope from the pattern, the tendency of the cope to describe part of a circle as it parts from the pattern and nowel, and which would be injurious to the perfection of the mold, is checked by the actions of the cam-shaped toe and guide-pin in the following manner: The moment the front of the cope is lifted upward the guide-pin in the jaws, and with it the back end of the cope, is made to rise very nearly,perpendicularly for a distance sufficient to clear the cope from the nowel by means of the camshaped toe bearing on the inclined shoulder or rib, and continues rising until the point of the cam-shaped toe, which is drawn in toward the nowel by the guidepin as it rises in the jaws, is in a perpendicular line with the pin, when it ceases to rise, and the cope, being then clear from the pattern and nowel, can be thrown back or lifted off at pleasure. The construction of the hinge is as follows: The butt or under part, A, of the hinge is provided with upright jaws b b, and has an inclined shoulder or rib, c, on one side. The upper part of the hinge, C, is prolonged, and terminates in a cani-shaped toe, d, projecting downward from and at the same angle with a horizontal line as the inclined shoulder or rib, and affixed to the side of the hinge is the guide-pin e.

The operation of the hinge is as follows: The butt or lower part, A, is affixed to the nowel part B of the flask, and the upper part, O, is affixed tothe cope D. Then the flask and hinges are put together for operation, the guide-pins e c are between and at the bott-0m of the jaws, while the face or under edge of the cam-shaped toe d of cach hinge fits snugly and evenly on the inclined rib or shoulder c. The mold being in readiness to part, thc cope is started by lifting on the forward part'of it, and at the saine instant the cam-shaped toes d d, bearing on the inclined shoulders c c, cause the guide-pins c c to rise in the jaws, and consequently with them the back part of .the cope is lifted very nearly perpendicularly off from the pattern and nowel at the same time that the forward part is; and when the points of the cam-shaped toes d d, which are drawn in toward the nowel as the guide-pins e e rise in the jaws, are in perpendicular line with the guide-pins, the back end 0f the cope substantially iu the manner :is described and ceases to rise, and is then clear from the patrepresented, by means of which the cope is tern, when item1 be lifted off or supported by raised in the jaws 0f the hinge, :is set forth.

:i rest-stick. y

Having thus described the Construction and I v GEORGE GRAND Operation of my hinge7 what I claim as new, ftnesses:

and desire to secure by Letters Patent, is- J No. J. SAVAGE,

A hinge for melders flasks, eonstruetedl Trios. JOHNSTON.' 

